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Explain the process of skeletal muscle contraction and why glucose is required for this process.

In skeletal muscle there exists a thick filament, myosin, and a thin filament, actin. For contraction both of these filaments need to interact causing a power stroke and muscle contraction. At rest, the myos...
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Answered by Shabri M. • Biology tutor
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Describe two features of the October Manifesto (6 marks) (IGCSE)

One feature of the October Manifesto was that it enabled the Tsar to survive the revolution of 1905. This is because Nicholas II showed that he was prepared to make concessions by introducing reforms which t...
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Answered by Mary G. • History tutor
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Solve the simultaneous equations: 6x - 5y = 17, 3x + 8y = 10

First, you will need to make one of the variables x or y have the same number in front. To do this just multiply the equation by a constant which will give you lets say the x value in this equation with the ...
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Answered by Jagjit S. • Maths tutor
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Describe the part played by each of the organelles involved in the production and secretion of the enzymes.

The Nucleus contains the DNA code for the amino acid sequence (2) 3. The Nucleolus makes rRNA (4) 5. The Ribosomes translate mRna in protein synthesis 6. The endoplasmic reticulum allows for the transport of...
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Answered by Aoife M. • Biology tutor
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Prove that the square of an odd number is always 1 more than a multiple of 4.

First we consider how to represent an odd number. We know that any even number can be represented as 2k for some integer k since, by definition, all even numbers are multiples of 2. We also know that all odd...
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Answered by Josh L. • Maths tutor
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